┌ MyPackageExt [2b66b2ab-f48c-58da-9972-304391d605c5]
│  ┌ Warning: Module MyPackageExt with build ID ffffffff-ffff-ffff-0000-11d7238cf423 is missing from the cache.
│  │ This may mean MyPackageExt [2b66b2ab-f48c-58da-9972-304391d605c5] does not support precompilation but is imported by a module that does.
│  └ @ Base loading.jl:1793
│  ┌ Error: Error during loading of extension MyPackageExt of MyPackage, use `Base.retry_load_extensions()` to retry.
│  │   exception =
│  │    1-element ExceptionStack:
│  │    Declaring __precompile__(false) is not allowed in files that are being precompiled.
│  │    Stacktrace:
│  │      [1] _require(pkg::Base.PkgId, env::Nothing)
│  │        @ Base ./loading.jl:1797
│  │      [2] _require_prelocked(uuidkey::Base.PkgId, env::Nothing)
│  │        @ Base ./loading.jl:1660
│  │      [3] _require_prelocked(uuidkey::Base.PkgId)
│  │        @ Base ./loading.jl:1658
│  │      [4] run_extension_callbacks(extid::Base.ExtensionId)
│  │        @ Base ./loading.jl:1255
│  │      [5] run_extension_callbacks(pkgid::Base.PkgId)
│  │        @ Base ./loading.jl:1290
│  │      [6] run_package_callbacks(modkey::Base.PkgId)
│  │        @ Base ./loading.jl:1124
│  │      [7] _require_prelocked(uuidkey::Base.PkgId, env::String)
│  │        @ Base ./loading.jl:1667
│  │      [8] macro expansion
│  │        @ ./loading.jl:1648 [inlined]
│  │      [9] macro expansion
│  │        @ ./lock.jl:267 [inlined]
│  │     [10] require(into::Module, mod::Symbol)
│  │        @ Base ./loading.jl:1611
│  │     [11] top-level scope
│  │        @ ~/.julia/packages/MyPackage/lObxj/ext/MyPackageExt.jl:8
│  │     [12] include
│  │        @ ./Base.jl:457 [inlined]
│  │     [13] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt128}}, source::String)
│  │        @ Base ./loading.jl:2045
│  │     [14] top-level scope
│  │        @ stdin:3
│  │     [15] eval
│  │        @ ./boot.jl:370 [inlined]
│  │     [16] include_string(mapexpr::typeof(identity), mod::Module, code::String, filename::String)
│  │        @ Base ./loading.jl:1899
│  │     [17] include_string
│  │        @ ./loading.jl:1909 [inlined]
│  │     [18] exec_options(opts::Base.JLOptions)
│  │        @ Base ./client.jl:305
│  │     [19] _start()
│  │        @ Base ./client.jl:522
│  └ @ Base loading.jl:1261
└